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/* This testcase is part of GDB, the GNU debugger.
Copyright 2008-2021 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#define _GNU_SOURCE
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/un.h>
#include <unistd.h>
void
marker1 (void)
{
}
void
marker2 (void)
{
}
char wdata[] = "abcdef";
struct iovec wv[1] = {
{ wdata, 6 },
};
char wc[CMSG_SPACE (sizeof (struct ucred)) + CMSG_SPACE (sizeof (int))];
struct msghdr wmsg = {
0, 0,
wv, 1,
wc, sizeof wc,
0,
};
char rdata[5] = "xxxx";
struct iovec rv[2] = {
{&rdata[2], 2},
{&rdata[0], 2},
};
char rc[CMSG_SPACE (sizeof (struct ucred)) + 7];
struct msghdr rmsg = {
0, 0,
rv, 2,
rc, sizeof rc,
0,
};
int fds[2];
int
main (void)
{
int itrue = 1;
/* prepare cmsg to send */
struct cmsghdr *cm1 = CMSG_FIRSTHDR (&wmsg);
cm1->cmsg_len = CMSG_LEN (sizeof (struct ucred));
cm1->cmsg_level = AF_UNIX;
cm1->cmsg_type = SCM_CREDENTIALS;
struct ucred *uc = (void *) CMSG_DATA (cm1);
uc->pid = getpid ();
uc->uid = getuid ();
uc->gid = getgid ();
struct cmsghdr *cm2 = CMSG_NXTHDR (&wmsg, cm1);
cm2->cmsg_len = CMSG_LEN (sizeof (int));
cm2->cmsg_level = AF_UNIX;
cm2->cmsg_type = SCM_RIGHTS;
int *pfd = (void *) CMSG_DATA (cm2);
*pfd = 2;
/* do the syscalls */
marker1 ();
socketpair (AF_UNIX, SOCK_DGRAM, 0, fds);
setsockopt (fds[0], SOL_SOCKET, SO_PASSCRED, &itrue, sizeof itrue);
sendmsg (fds[1], &wmsg, 0);
recvmsg (fds[0], &rmsg, 0);
marker2 ();
return 0;
}
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